/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.pig.impl.eval.window;

import java.util.ArrayList;
import java.util.List;

import org.apache.pig.impl.eval.EvalSpec;
import org.apache.pig.impl.logicalLayer.schema.Schema;

public abstract class WindowSpec extends EvalSpec {

    public enum windowType {SLIDING, HOPPING};
    protected windowType type;
    
    public WindowSpec(windowType type){
        this.type = type;
    }

    @Override
    public List<String> getFuncs() {
        return new ArrayList<String>();
    }

    @Override
    protected Schema mapInputSchema(Schema input){
        return input;
    }
    
    
}
